dataset.py 文件源码

def swap2opt(tsptw_sequence,i,j):
    new_tsptw_sequence = np.copy(tsptw_sequence)
    new_tsptw_sequence[i:j+1] = np.flip(tsptw_sequence[i:j+1], axis=0) # flip or swap ?
    return new_tsptw_sequence

# One step of 2opt  = one double loop and return first improved sequence